Knob



FIG. 1 is a perspective view of a knob showing my new design;

FIG. 2 is a side view thereof, the opposite side being a mirror image of the side shown;

FIG. 3 is an end view thereof, the opposite end being a mirror image of the end shown; and,

FIG. 4 is a top elevational view thereof, the undisclosed bottom is not part of the claimed design. 

The ornamental design for a knob, as shown and described. 